/*
 * Find out device-mapper's major version number the first time 
 * this is called and whether or not we support it.
 */
int dm_check_version(void)
{
	char libversion[64], dmversion[64];
	const char *compat = "";

	if (_version_checked)
		return _version_ok;

	_version_checked = 1;

	if (_check_version(dmversion, sizeof(dmversion), _dm_compat))
		return 1;

	if (!_dm_compat)
		goto bad;

	log_verbose("device-mapper ioctl protocol version %u failed. "
		    "Trying protocol version 1.", _dm_version);
	_dm_version = 1;
	if (_check_version(dmversion, sizeof(dmversion), 0)) {
		log_verbose("Using device-mapper ioctl protocol version 1");
		return 1;
	}

	compat = "(compat)";

	dm_get_library_version(libversion, sizeof(libversion));

	log_error("Incompatible libdevmapper %s%s and kernel driver %s",
		  libversion, compat, dmversion);

      bad:
	_version_ok = 0;
	return 0;
}
/*
 * Find out device-mapper's major version number the first time 
 * this is called and whether or not we support it.
 */
int dm_check_version(void)
{
	char dmversion[64];

	if (_version_checked)
		return _version_ok;

	_version_checked = 1;

	if (_check_version(dmversion, sizeof(dmversion)))
		return 1;


	return 0;
}